Ana Lilia Trujillo, left, sits in the courtroom before opening arguments in her trial Monday,March 31, 2014, in Houston. Trujillo, 45, is charged with murder, accused of killing her 59-year-old boyfriend, Alf Stefan Andersson, at his Museum District high-rise condominium in June 2013.

Photo: Brett Coomer, Houston Chronicle

Ana Lilia Trujillo, left, sits in the courtroom before opening...

Image 2 of 19

Prosecutor Sarah Mickelson give her opening argument in the trial against Ana Lilia Trujillo Monday,March 31, 2014, in Houston. Trujillo, 45, is charged with murder, accused of killing her 59-year-old boyfriend, Alf Stefan Andersson, at his Museum District high-rise condominium in June 2013.

Photo: Brett Coomer, Houston Chronicle

Prosecutor Sarah Mickelson give her opening argument in the trial...

Image 3 of 19

Ana Lilia Trujillo, left, sits in the courtroom before opening arguments in her trial Monday,March 31, 2014, in Houston. Trujillo, 45, is charged with murder, accused of killing her 59-year-old boyfriend, Alf Stefan Andersson, at his Museum District high-rise condominium in June 2013.

Photo: Brett Coomer, Houston Chronicle

Ana Lilia Trujillo, left, sits in the courtroom before opening...

Image 4 of 19

Annika Lindqvist sits in the witness stand as she give testimony in the trial against Ana Lilia Trujillo on Monday,March 31, 2014, in Houston. Trujillo, 45, is charged with murder, accused of killing her 59-year-old boyfriend, Alf Stefan Andersson, at his Museum District high-rise condominium in June 2013.

Photo: Brett Coomer, Houston Chronicle

Annika Lindqvist sits in the witness stand as she give testimony in...

Image 5 of 19

Prosecutor Sarah Mickelson give her opening argument in the trial against Ana Lilia Trujillo Monday,March 31, 2014, in Houston. Trujillo, 45, is charged with murder, accused of killing her 59-year-old boyfriend, Alf Stefan Andersson, at his Museum District high-rise condominium in June 2013.

Photo: Brett Coomer, Houston Chronicle

Prosecutor Sarah Mickelson give her opening argument in the trial...

Image 6 of 19

Ana Lilia Trujillo stands with her attorney, Jack Carroll, in court for her trial Monday, March 31, 2014, in Houston. Trujillo, 45, is charged with murder, accused of killing her 59-year-old boyfriend, Alf Stefan Andersson, at his Museum District high-rise condominium in June 2013. ( Brett Coomer / Houston Chronicle )

Ana Lilia Trujillo, 45, charged with murder, accused of killing her 59-year-old boyfriend, Alf Stefan Andersson, sits in the 338th State District Court during jury selection of her trial Friday, March 28, 2014, in Houston.

More than 60 prospective jurors will answer questions in state District Judge Brock Thomas' court as part of the daylong process to find a 12-member jury.

Photo: James Nielsen, Houston Chronicle

More than 60 prospective jurors will answer questions in state...

Image 11 of 19

Prosecutors believe Trujillo may have stomped the 59-year-old University of Houston professor while wearing the heels, according to court records. She is accused of striking him with the heel, strangling him and smothering him, possibly by sitting on his chest as he bled from head wounds.

Photo: James Nielsen, Houston Chronicle

Prosecutors believe Trujillo may have stomped the 59-year-old...

Image 12 of 19

"There is a history of abuse and battered spouse syndrome, this is pure self defense," said Jack Carroll, Trujillo's attorney. "She didn't go nuts or anything that night. She did what she had to do to defend herself."

Photo: James Nielsen, Houston Chronicle

"There is a history of abuse and battered spouse syndrome, this is...

Image 13 of 19

The 45-year-old Trujillo faces life in prison if convicted of murder in the June 9 death of Dr. Alf Stefan Andersson, a University of Houston researcher.

Photo: James Nielsen, Houston Chronicle

The 45-year-old Trujillo faces life in prison if convicted of...

Image 14 of 19

Ana Lilia Trujillo, 45, arrives for court Friday with her attorney, Jack Carroll, for jury selection in her murder trial in the killing of 59-year-old boyfriend Alf Stefan Andersson with a stiletto high heel shoe.

Ana Lilia Trujillo, 45, arrives for court Friday with her attorney, Jack Carroll, for jury selection in her murder trial in the killing of 59-year-old boyfriend Alf Stefan Andersson with a stiletto high heel shoe.

Ana Trujillo was covered in blood when she opened the door for Houston police at her boyfriend's luxury high-rise condominium.

The body of Alf Stefan Andersson, 59, lay bloodied on the floor. He had been beaten and stabbed in the face at least 25 times by a stiletto high heel.

"It looked like something out of a horror movie," prosecutor Sarah Mickelson told a jury of seven men and five women on Monday. "There was so much blood, the police officer thought Stefan had been shot in the face."

During opening arguments in Trujillo's trial on murder charges, Mickelson said the 45-year-old's anger and aggression took over on June 9 and she beat Andersson "to bloody pulp."